节曲面 meaning in English

pitch surfaces

So far , the main frame of the conjugation of betrand are established , on the basis of which , it is given that the primary condition the directrix line must be satisfied , the relative curvature of the conjugating surfaces , the relations between non - interventional condition and curvature axle of the directrix line , and so on . the transmission of normal circular - arc gear is a typical bertrand conjugation . in order to promote the transformation from theory to technology , the general principle of this kind of transmission is studied
为了使研究更加贴近于工程，便于解析处理，提出准面的概念，并确立由准面到准线的研究路线，给出了各种传动形式下准面与准线的具体特征，证明了共轭准面上两准线的诱导测地曲率等于零的这一不干涉条件，进而指出，当准面为平行轴和相交轴传动的节曲面时，不干涉条件自然满足。